I think it's called fairness. Wealthy (relatively speaking) people coming to a 3rd world country and benefiting from it yet not willing to pay a fair price for doing so while seeing the poor education system the health care system and lack of infrastrucure does not seem fair to me. That is just another form of colonialism... What are the guys who own condos/houses going to do? sell their properties because the land tax is now a little higher but still much less than in the US, Canada, Europe or other Caribbean countries? I doubt it. They will keep their property and still enjoy Belize.
Not sure about the constitution (I'm not a lwayer)but I'm sure they can add a tax to foreign investment/land purchase and if the constitution says they can't they must be able to change it. I doubt the citizens who get to vote would dump a gov't for trying to improve their lives by getting non-citizens to help pay.
Capt., I have donated...